The equation describing the flow of the couplings, the so called Wetterich equation has been established in [1]} in the case of a theory with closure constraint:
For a given cut-off \(R_k\) , the effective average action satisfies the following first order partial differential equation:
\(\partial _k\Gamma _k=\sum _{\vec{p}\in \mathbb {Z}^5}\partial _kR_k(|\vec{p}|)\cdot \big [\Gamma ^{(2)}_k+R_k\big ]^{-1}(\vec{p},\vec{p})\delta \bigg (\sum _{i=1}^5 p_i\bigg ).\) 
